309 Fraternitas
main-belt asteroid
309 Fraternitas is a typical Main belt asteroid. It was discovered by Johann Palisa on 6 April 1891 in Vienna. The asteroid name is Latin for 'fraternity'; it was so named in order to commemorate the 25th anniversary of the Maturitätsprüfung Fraternity.
This minor planet is orbiting the Sun at a distance of 2.665 AU with an orbital eccentricity (ovalness) of 0.115 and a period of 4.35 yr. The orbital plane is inclined at an angle of 3.72° of the ecliptic. Analysis of the asymmetric bimodal light curve of the asteroid from photometric data collected during 2014 provide a rotation period of 22.398±0.001 h with a brightness variation of 0.12±0.01 in magnitude.
Begin with the source’s own compact description: “309 Fraternitas” is main-belt asteroid. The dossier treats that line as a proposition to test through Fraternitas, main-belt and asteroid, not as a finished interpretation.
Why this record matters
The phrase “main-belt asteroid” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 4, 2026. The linked authority identifier is Q150834. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1891 and 2014.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “309 Fraternitas”, its source revision and the description used here.
- Expand the search: follow 309 Fraternitas primary sources, 309 Fraternitas archive and Fraternitas research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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- Which cited source is closest to the event, object or claim?
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This entry incorporates text from “309 Fraternitas” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.